The X-IFU in a nutshell
The X-IFU key performance requirements are listed below.
Table 1: Key performance requirements for X-IFU
|Energy range||0.2-12 keV|
|Energy resolution: E < 7 keV||2.5 eV (249 μm pitch)|
|Energy resolution: E > 7 keV||E/dE = 2800|
|Field of View||5’ (diameter) (3840 TES)|
|Effective area @ 0.3 keV||1500 cm2|
|Effective area @ 1.0 keV||15000 cm2|
|Effective area @ 7.0 keV||1600 cm2|
|Gain error (RMS)||0.4 eV|
|Count rate capability – nominal bright sources||1 mCrab (>80% high-resolution events)|
|Count rate capability – brightest sources||1 Crab (>30% throughput)|
|Time resolution||10 μs|
|Non X-ray background (2-10 keV)||< 5 10-3 counts/s/cm2/keV (80% of the time)|
The functional block diagram of the X-IFU.